Feature

Geology and Ethnology Disagree about Rock Prints

Mathematical Equations to Aid Stratosphere Flying

Mass Mania

Position Finders Developed to Tell Pilot Where He Is

Automatic Position Finder Is Developed in England

Health Hints for Tropic Vacations

Health Service Fighting Dixie’s Spreading Menace

Blood Letting Used to Check Bleeding in Hemophilia

Earthquake Observatory Established in California

Bacteria Turn Wood Sugars into Valuable Chemicals

In Science Fields

Suffering Seven Millions